| With the development of economy,change the mode of modern warfare,the special requirements of national defense,the development of light weapons,put forward new requirements in miniaturization and precision components of electronic devices in the face of pyrotechnics,namely on pyrotechnics glass and metal seal(your plate plug)of the air tightness and reliability requirements is provided.Glass and metal sealing press technology is widely used in the military field,wherein the electrode plug with its excellent air tightness and sealing performance,the comprehensive performance of mechanical strength,the actual production and application are widely used in military aviation,aerospace,shipbuilding,nuclear power and civilian industry,and the titanium alloy low density ratio strength,high specific stiffness,corrosion resistance and high temperature mechanical properties,anti fatigue and side resistance are good,with excellent comprehensive performance,is a new structural material,have development and application at the king,also with glass on the monkey,meet the requirement of high air tightness.There is great potential to make up for the lack of common metal materials.Based on the existing research at home and abroad,this these eed electrode plug using titanium alloy glass sealing tightness,insulation defect resistance failure etc.,based on glass metal seal sealing basic conditions,sealing mechanism,sealing technology of sealing performance,metal sealing glass the requirements and sealing technology research from many factors affect the performance of electrode plug screening that the main factors affecting thesealing parts of air tightness test is:expansion coefficient,and excellent metal sealing surface,proper sealing process.Secondly,according to the modified Debye griinsisen model,titanium thermal expansion coefficient is 9.3×10-6k-1,the matching sealing method of test and test results of data chart analysis of sealing glass expansion coefficient and composition affect the sealing performance and bismuth glass sealing system can match with titanium the alloy;secondly,the sealing shell of titanium alloy electroplating nickel layer is the implementation of the transition sealing method was used to detect the coating thickness of the oxide film coating thickness tester,using MATLAB curve to simulate the optimal film thickness of 3-5um;then,describes the basic process of glass metal seal process,firstly a simple comparison method the sealing parameters for the sealing temperature is 910 degrees centigrade,the flow rate of N2 is 1000L/h,the sealing time is 20min,the test method is not comprehensive,the process is not necessarily the best The.Then the orthogonal design of three factors and five levels experiment using orthogonal design method,to determine the sealing parameters of sealing temperature is 940 DEG C,the sealing time is 20min,the flow rate of N2 to determine the optimum sealing parameters of sealing temperature is 940 DEG 1400L/h and variance analysis of data by range data analysis 750L/h,the flow rate of N2,the sealing time is 30min.Finally,through matching the expansion coefficient,the best oxide film thickness and the best sealing process,we can solve the problem of air tightness and insulation failure of titanium alloy glass sealing.In order to obtain a new type of titanium alloy sealing glass and its sealing process,which has reached the international leading level.The research results show that bismuth salt glass can be well sealed with TC4.The best nickel plating thickness of titanium alloy is 3-5um,and the most important factor is the sealing temperature.The best sealing technology is:sealing temperature is 940 degrees,holding time is 30min,nitrogen inlet volume is 750L/h.It was shown that expansivity had a great influence on the capability of sealing.The optimal process is that the sealing piece was sintered at 940? for 30 minutes under 750L/h condition. |
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